you need to edit your grub file run these command in terminal sudo nano /etc/default/grub
change GRUB_CMDLINE_LINUX="" to GRUB_CMDLINE_LINUX="acpi_backlight=vendor" save it and run sudo update-grub -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1181512 Title: Cannot adjust screen brightness To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1181512/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
